Asturias: I fear that you are referring to the Whitley crew of 10 Sqn that, on the night of 27/28 May 1940, accidentally bombed RAF Bassingbourn, believing it was the airfield at Schipol. They had suffered a severe lightning strike (as had another crew that diverted on account of a shock that had got to the pilot) on the outbound leg to targets in the Ruhr, and matters clearly went downhill from then on. A version of the story is in Max Hastings' "Bomber Command." This was a particularly egregious example of the navigation standards in the night bomber force that would be revealed in the Butt Report in mid-1941.